CAPS 391 Study Guide - Evaporation, Deamination, Water Gas
17 Feb 2013
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Enters cells by facilitated diffusion, converted to glucose-6-phosphate, cannot recross plasma membrane. Glycogenesis > converts excess glucose to glycogen, most in skeletal muscle and liver. When glycogen stores are full, glucose and amino acids synthesize lipids (lipogenesis). Glyceraldehyde-3-phosphate is converted to glycerol, 2-carbon acetyl-coa molecules join to form fatty acid chains. Glycerol and 3 fatty acids combine to form triglycerides *. Glucose is needed > glycogen is broken down to glucose-6-phosphate through glycogenolysis. In skeletal muscle, glucose-6-phosphate goes through glycolysis to produce atp. Liver uses it for energy or converts it to glucose which is released into blood. Skeletal muscle lacks enzymes to convert glucose-6- phosphate to glucose, cant release glucose into blood. Glucose releases from liver to maintain blood glucose levels between meals. When liver glycogen levels are inadequate to supply glucose, its synthesized from proteins or lipids (gluconeogenesis). Amino acids can be converted into citric acid cycle molecules (acetyl-coa or pyruvic acid) then to glucose.
